QSC-EX1250-pwr-sch维修电路原理图.pdf

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1、AUDIO PRODUCTS PHQ 5-15-91 SCHEMATIC EX-1250 DRAWING 1 3 NOTES. 1. ALL RESISTORS 1/4-WATT, 5% UNLESS NOTED. 2. ALL CAPACITORS 100V UNLESS NOTED. TOLERANCE 20% FOR ELECTROLYTIC TYPES, 10% ON OTHER TYPES. PC-004001-00 PC-004002-00 DISPLAY PCB INPUT PCB SPKR PCB 101-199201-2991-29 301-399401-49931-49 5

2、01-599601-69951-69 701-799801-89971-99 901-UP (SAME BOARD FOR CH 1, CH2) PCB NUMBER DESCRIPTION CH 1 PARTS CH 2 PARTS PARTS IN COMMON 8. PARTS MARKED WITH TRIANGLE MUST BE REPLACED WITH EXACT TYPE ONLY. 9. PARTS ENCLOSED WITHIN DOTTED OUTLINE HAVE VOLTAGES GREATER THAN 42V. SCHEDULE OF TEST POINTSET

3、CJ 502-1 CH-1CH 2 J 502-6 J 602-6 SWITCHED POS AMPLIFIER RAIL-HIGH VOLTAGE J 502-1 J 602-1 NEGATIVE LIMITING VOLTAGE J 502-2 J 602-2 POSITIVE LIMITING VOLTAGE J 502-4 J 602-4 AMPLIFIER LOOP OPAMP OUTPUT J 502-8 J 602-8 SWITCHED NEG AMPLIFIER RAIL-HIGH VOLTAGE J 502-3 J 602-3 SWITCHING THRESHOLD REFE

4、RENCE VOLTAGE PC-004104-00 PC-004101-00AMP PCB PC-004103-00AC PCB 3. BRIDGE RECTIFIER BR 51, 1.5A, 100V. 4. R 598, 698 IS POSITIVE TEMPERATURE COEFFICIENT RESISTOR MOUNTED TO HEAT SINK. 6. ZENERS D 503, 504, 603, 604 MARKED 7.5 V TESTED FOR LOW LEAKAGE, QSC P/N QD-0007.5-ZT. 7. ZENERS D 509, 513, 60

5、9, 613, 6.2V-500mW, TESTED FOR LOW LEAKAGE, QSC P/N QD-000024-QD. +23V 0N/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROL 1N4004 2200 35V -15 V REG -24 V UNREG 100 +24 V UNREG +15 V REG78153 2 1 1N4746, 18V 1N4746, 18V 1002200 35V 7915 32 1 18 Vac1 18 Vac2 CT3 +24 V +15 V -15 V

6、-24 V XF PTC XF PTC J 51 U 52 D 53 D 52 U 51 C 54 C 53C 56 C 55 D 51 BR 51 35 V 35 V SHEET 1, HOUSEKEEPING SUPPLY AND FAN SPEED CONTROLSHEET 1, HOUSEKEEPING SUPPLY AND FAN SPEED CONTROL -24 V 24 V BRUSHLESS FAN 2.7K 2.7K 2.7K 2.7K 47K .01 RN 51 C 52 Q 52 2N2907 Q 53 2N4410 R 52 R 51 C 57 C 51 Q 51 2

7、SC3298B 100-35V 47-10NP +23V 0N/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROL J 52-1 J 52-4 TO SHEET 2 TO SHEET 3 SCHEMATIC, 2-CH POWER AMPLIFIER EX 1250SCHEMATIC, 2-CH POWER AMPLIFIER EX 1250 PART NUMBERING SCHEDULE FOR PCBS USED IN EX-1250: 5. Q 503, 504, 603, 604 ARE SWITCH

8、ING FETS. QSC P/N QD-000013-00 OR QD-000031-QD. 125 W, 50 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX. 5 4 A B C D B PROD RELEASE PER ECO 1107 GLF A 3.3-1W R 53 HEAT SINK GROUND AUDIO AND POWER GROUNDS C REVISED PER ECO 1127 RDS7-12-91 5-29-91SGM DREVISED PER ECO 1262 LG RESISTANCE 100 OHM COLD, RISING

9、AT 55 C. QSC P/N RE-000006-PT E REVISED PER ECO 1289 PHQ11-6-91 DOC NO. SH-004101-01 SGM SGM 10-9-91 SGM F REVISED PER ECO 1508 SGM6-10-92 APPLICATION USED ONNEXT ASSY WP-004101-10EX1250 REV E, 11-6-91, FOR PC-004101-00 REV D SGM G REVISED PER ECO 1602 WR10-21-92 1 3 4 2 LAST USED REF. DESIGN. C51 -

10、 57, C526, 626 D51 - 53, D513, 613 F504, 604 J51, 52, J503, 603 K501, 601 L501, 601 Q51 - 53, Q510, 610 R51 - 53, R544, 644, R598, 698, R599, 699 RN51, RN502, 602 U51, 52, U506, 606 VR503, 603 BR 51, BR 502, 602 SGM H REVISED PER ECO 2009 LG /RAB 180K SGM J REVISED PER ECO 2371 MP (EFF. 7-28-94) 5-1

11、1-94 FAN BLK FAN RED SGM K REVISED PER ECO 2506 MP (EFF. 12-09-94) 7-20-94 SH-004101-01 1 K SH1250J1.FCDSH1250K1.FCD SH-004101-01 K RadioFans.CN 收音机爱 好者资料库 2 OF 3 A SPKR SIG GND GND GND A CLIP 10K-2W 470-10V 470-10V 10K-2W TO +15V TO +15 V TO -15 V 5K 5K 7.5K-2W 22-1W 2SA1302 .22-3W 2SC3281 IN5402 2

12、2-1W 4.7-1W 4.7-1W 2SA1306B 2SC3298B .10 2.7-2W D GS .10 15K 750K 750K 332 332 A 1K-4 2.7K 5532 1N5402 2uH .10 1 2 3 4 5 6 7 8 +15 V -15 V A C D B HEATSINK GROUND SPEAKER BUS AUDIO OUTPUT STAGE SWITCHING THRESHOLD REFERENCE .0022 470-10V 22 FP 3K-2W 7.5V 7.5V .0033 100 BIAS SOURCE REF D GS 22 FP 2.7

13、-2W.10 .22-3W 3 PL 3 PL 3 PL 3 PL 10A-250V 10A-250V SPEAKER COMMON 10A-250V 10A-250V TRANSFORMER CENTER TAP SPEAKER OUTPUT NC NO TO -24 V 1N4004 1N4004 25 C .01 50 OHM BIAS NETWORK 1N400410-25V TO -24 V 470-1W PTC-60C THERMALLY CONNECTED MUR 810 MUR 810 5.6-2W T7 T8 GATE SOURCE REF GATE DRIVER SCHMI

14、DTT COMPARATOR LOSS-OF-SAT SHUTDOWN T9 HIGH RAIL IC-000008-00 T4 SLEWNEG SUPP T6 BOOTSTRAP CAP T1 REF VOLT T2 LOW RAIL T3 SHUTDOWN T5 T6 T7 GATE GATE DRIVER LOSS-OF-SAT SHUTDOWN IC-000009-00 T5 GATE PWR T4 SLEW T3 SHUTDOWN T2 LOW RAIL T1 REF VOLT SOURCE REF SCHMIDTT COMPARATOR T 6 +15 V T15 -15 V T1

15、6 PROCESSING BUFFER 50C +O.5V 90C +8V THERM ADJUST, 0.5-8.5V THERMAL SENSING T 1 T 3 GROUND MUTING INPUT CAP. TIMING CAP. T 2 RELAY DRIVER T 4 ON-OFF MUTING DELAY RELAY MUTE -24V RUN +15V MUTING BUS RUN 0V MUTE +8V SHUTDOWN MUTING IC-000010-00 MUTE BUS T 5 T 7 THERMAL SENSE, 0-8V T 8 THERMAL BUS, 0-

16、8V T 9 OP-AMP OUT - HF PROTECTSHUTDOWN DETECTORS TO MUTING DC PROTECT SENSE T10 THERMAL LIMITING T11 IDLE -1.2V CLIP +3V PEAKS0-3Vac NORMAL AUDIO 4.5-6.5Vac CLIPPING PEAKSMUTE +4.5V LIMITING THRESHOLD +4.5V CLIP RECTIFIER-BUFFER HIGH FREQ DC RECTIFIER THERMAL T12 T13 T14 CLIP BUS OP-AMP OUT OPTOCELL

17、 T25 POSITIVE DRIVER, +0.6V IDLE T24 NEGATIVE DRIVER, -0.6V IDLE T23 POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHORT POSITIVE BIAS CONTROLLER T22 POSITIVE CURRENT FEEDBACK +3V PEAK T21 POS CURRENT TRIMMER T20 OUTPUT VOLTAGE FEEDBACK LOAD IMPEDANCE SENSING T19 NEGATIVE TRIMMER BIAS ENABLE NEGATIVE BIAS CO

18、NTROLLER T18 NEGATIVE CURRENT FEEDBACK, -3V PEAK T17 NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT BIAS 680p J 502-1 J 502-3J 502-6 J 502-8 J 502-2 + CURR LIM+ CURR LIM - CURR LIM- CURR LIM- CURR LIM R 598 U 501 D 504 R 511Q 504 R 512C 503 C 509 J 501 6-PIN MATE-LOK 3 4 6 1 2 5 D 502 C 511 BR 502 BR 50

19、1 F 502 F 504 F 501 F 503 K 501 VR 501 R 599 C 504 D 505 D 506 R 508 R 503R 506 R 501R 505 R 507 Q 502 R 504 R 502 Q 501 R 519 R 518 R 520R 521R 522 Q 508Q 509Q 510 D 508 Q 505Q 506Q 507 R 516R 515R 517 D 507 L 501 R 525 C 506 C 510 C 507 5.6-2W R 523 D 503 U 502 R 514 R 510 C 505 Q 503 D 501 R 509C

20、 501 C 508 TO RECT BR 501 TO RECT BR 502 TO Q 508 3K-2W R 526 U 505-B R 534C 523 RN 502 R 535 U 505-A C 519 C 512 R 530 R 528 C 513 VR 503 VR 502 R 529 C 518 U 503 R 527 C 515 C 514 C 516R 531 47-50V 47-50V D 512 47K-1W R 542 TO -15V +23V 0N/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPE

21、ED CONTROLTO SHEET 1 SCHEMATIC, EX-1250, SHEET 2, AMPLIFIER CHANNEL ASCHEMATIC, EX-1250, SHEET 2, AMPLIFIER CHANNEL A 590 J 52-5 J 52-6 +92 V RAIL +46 V RAIL +46 +92 V SWITCHED BUS -46 V RAIL -92 V RAIL -46 -92 V SWITCHED BUS TO -92 V RAIL TO -46 V RAIL 15000-50V 15000-50V 15000-50V 15000-50V 1.5K 1

22、.5K C 502 47-50V R 513 22K-1W 3.9-2W R 524 R 532, 47K 6 5 12 13 11 J 502-4 +INPUT GND REF PWR-ON AUDIO INPUT STAGE HEAVY LINE SHOWS MAIN SIGNAL PATH SPEAKER BUS 47K-1W R 533 VTL 5C4 U 504 68 p 1N4735 A 5532 10K-4 21.5K-.5W 75K 47 BA 3 5 6 8 4 7 +15 V -15 V DC 2 1 6.2 V A .0022 .12 47-10NP C 525 U 50

23、6-B R 541 RN 501 U 506-A D 511 C 520 C 521 R 538R 536R 537 C 524 R 540 C 522 R 539 D 509 1N 4148 D 510 1N 4148 1N4735 6.2 V D 513 C 526 1.5 K A 7 9 14 590 TO +46 V RAIL 590 R 544 27K 220-10NP C 517 THERMAL MUTE 14-PIN RIBBON J 503 10 8 R 543 330K 27 p SH-004101-01 2 K SH-004101-01 K SH1250K2.FCD 18p

24、F-5% RadioFans.CN 收音机爱 好者资料库 A SPKR SIG GND GND GND A 10K-2W 470-10V 470-10V TO +15V +24 V +15 V -15 V -24 V 10-25V TO +15 V TO -15 V 5K 5K 7.5K-2W N.C. N.C. N.C. N.C. PTC-60C THERMALLY CONNECTED 22-1W 2SA1302 .22-3W 2SC3281 IN5402 22-1W 4.7-1W 4.7-1W 2SA1306B 2SC3298B .10 3.9-2W D GS .10 15K 750K 7

25、50K 332 332 A 1K-4 2.7K 5532 1N5402 2uH .10 1 2 3 4 5 6 7 8 +15 V -15 V A C D B HEATSINK GROUND SPEAKER BUS AUDIO OUTPUT STAGE SWITCHING THRESHOLD REFERENCE .0022 470-10V 22 FP 3K-2W 7.5V 7.5V 1N4004 .0033 1N4004 100 BIAS 25 C .01 50 OHM BIAS NETWORK SOURCE REF D GS 22 FP 2.7-2W.10 .22-3W 3 PL 3 PL

26、3 PL 3 PL 10A-250V 10A-250V SPEAKER COMMON 10A-250V 10A-250V TRANSFORMER CENTER TAP SPEAKER OUTPUT NC NO TO -24 V MUR 810 MUR 810 14-PIN RIBBON 5.6-2W T7 T8 GATE SOURCE REF GATE DRIVER SCHMIDTT COMPARATOR LOSS-OF-SAT SHUTDOWN T9 HIGH RAIL IC-000008-00 T4 SLEWNEG SUPP T6 BOOTSTRAP CAP T1 REF VOLT T2

27、LOW RAIL T3 SHUTDOWN T5 T6 T7 GATE GATE DRIVER LOSS-OF-SAT SHUTDOWN IC-000009-00 T5 GATE PWR T4 SLEW T3 SHUTDOWN T2 LOW RAIL T1 REF VOLT SOURCE REF SCHMIDTT COMPARATOR T 6 +15 V T15 -15 V T16 PROCESSING BUFFER 50C +O.5V 90C +8V THERM ADJUST, 0.5-8.5V THERMAL SENSING T 1 T 3 GROUND MUTING INPUT CAP.

28、TIMING CAP. T 2 RELAY DRIVER T 4 ON-OFF MUTING DELAY RELAY MUTE -24V RUN +15V MUTING BUS RUN 0V MUTE +8V SHUTDOWN MUTING IC-000010-00 MUTE BUS T 5 T 7 THERMAL SENSE, 0-8V T 8 THERMAL BUS, 0-8V T 9 OP-AMP OUT - HF PROTECTSHUTDOWN DETECTORS TO MUTING DC PROTECT SENSE T10 THERMAL LIMITING T11 IDLE -1.2

29、V CLIP +3V PEAKS0-3Vac NORMAL AUDIO 4.5-6.5Vac CLIPPING PEAKSMUTE +4.5V LIMITING THRESHOLD +4.5V CLIP RECTIFIER-BUFFER HIGH FREQ DC RECTIFIER THERMAL T12 T13 T14 CLIP BUS OP-AMP OUT OPTOCELL T25 POSITIVE DRIVER, +0.6V IDLE T24 NEGATIVE DRIVER, -0.6V IDLE T23 POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHOR

30、T POSITIVE BIAS CONTROLLER T22 POSITIVE CURRENT FEEDBACK +3V PEAK T21 POS CURRENT TRIMMER T20 OUTPUT VOLTAGE FEEDBACK LOAD IMPEDANCE SENSING T19 NEGATIVE TRIMMER BIAS ENABLE NEGATIVE BIAS CONTROLLER T18 NEGATIVE CURRENT FEEDBACK, -3V PEAK T17 NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT BIAS 680p J 60

31、2-1 J 602-2 + CURR LIM+ CURR LIM - CURR LIM- CURR LIM J 602-8 J 602-6J 602-3 J 602-4 TO Q 607 U 601 D 604 R 611 Q 604 R 612C 603 D 602 J 601 6-PIN MATE-LOK 3 4 6 1 2 5 BR 602 BR 601 F 602 F 604 F 601 F 603 K 601 C 609 C 611 VR 601 R 699 C 604 D 605 D 606 R 608 R 603 R 601 R 607 R 606 R 605 Q 602 R 6

32、04 R 602 Q 601 R 619 R 620R 621R 622 Q 608Q 609Q 610 D 608 Q 605Q 606Q 607 R 616R 615R 617 D 607 R 618 L 601 R 625 5.6-2W R 623 C 606 C 610 R 624 C 607 D 603 U 602 R 614 D 601 C 601 Q 603 C 608 R 610 C 605 TO RECT BR 601 TO RECT BR 602 470-1W 1N4004 3K-2W R 626 U 605-A U 605-B C 619 R 634C 623 C 612

33、 RN 602 R 635 R 628 R 630 CLIP C 618 R 629 VR 602 VR 603 C 613 47-50V 47-50V C 615 C 614 U 603 C 616 R 631 J 603 R 698D 612 47K-1W TO -15V R 642 TO -24 V SCHEMATIC, EX 1250, SHEET 3, AMPLIFIER CHANNEL BSCHEMATIC, EX 1250, SHEET 3, AMPLIFIER CHANNEL B 590 J 52-2 J 52-3 2.7-2W R 609 +92 V RAIL +46 V R

34、AIL +46 +92 V SWITCHED BUS -46 V RAIL -92 V RAIL -46 -92 V SWITCHED BUS TO -92 V RAIL TO -46 V RAIL 15000-50V 15000-50V 15000-50V 15000-50V +23V 0N/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROLTO SHEET 1 1.5K 1.5K 3 OF 3 C 602 47-50V R 613 22K-1W R 632, 47K +INPUT GND REF PWR-

35、ON AUDIO INPUT STAGE HEAVY LINE SHOWS MAIN SIGNAL PATH SPEAKER BUS 47K-1W J 602-4 R 633 1N4735 6.2 V 1N 4148 D 611 D 610 14 9 7 A 21.5K-.5W 75K 47 3 2 1 .0022 .12 C 622 R 640 R 638 C 621 C 620 R 639 R 637 U 606-A R 641 1N 4148 1N4735 6.2 V C 626 D 613 D 609 590 A 8 4 7 +15 V -15 V C 68 p A 47-10NP C

36、 624 R 636 1.5 K C 625 5532 10K-4 B 5 6 D RN 601 U 606-B VTL 5C4 A U 604 27K R 643 R 644 TO +46 V RAIL 590 10K-2W 220-10NP R 627 C 617 THERMAL MUTE 6 5 12 13 1 3 4 2 10 8 11 330K 27 p SH-004101-01 3 K SH-004101-01 K SH1250K3.FCD 18pF-5% RadioFans.CN 收音机爱 好者资料库 SIG. GND + INPUT - INPUT 1K THERM BUS,

37、0-8V PWR-ON, 0-15V 10uF + 2N4410 PWR GND SPKR SIGNAL, 5V PK CLIP-LIM BUS, 0-4V MUTE BUS, 0-8V 5532 10K 100p 100p 1.5K REG. -15V SIG. GND SIG. GND + INPUT - INPUT THERM BUS, 0-8V PWR-ON, 0-15V SPKR SIGNAL, 5V PK CLIP-LIM BUS, 0-4V MUTE BUS, 0-8V SIG. GND PWR GND C101 RN101 10K D(C) 10K B 10K C(D) 10K

38、 A C102 R102 U101 B 4 8 5 6 7 1 2 3 5 VR101 11 23 19 15 21 17 Q103 R112 C108 4 6 7 8 24 19 16 18 14 GAIN CH 2 PINS NOTES 1. ALL RESISTORS 1/4 WATT UNLESS SPECIFIED. 2. ALL CAPACITORS 25V UNLESS SPECIFIED. 3. CH 2 RESISTOR NETWORK SECTIONS ( ) WHEN DIFFERENT. 4. CH 1 COMPONENTS NUMBERED 101-199 5. CH

39、 2 COMPONENTS NUMBERED 201-299. 6. PARTS IN COMMON TO BOTH CHANNELS NUMBERED 1-99. 7. U102, 202 ROHM BA6124 OR SAMSUNG KA2284/85 13 GRN 1K-D RN103 LD105 PWR ON BA6124 100 YELYEL 10uF 330K R105 LD103 U102 C105 R107 536 R108 LEVEL -30 -10 LD104 10K R106 10uF C106 3.9K R109 RN 104 1K-C -24V +24V AC REL

40、AY 2 AC RELAY 1 REG. +15V 25 26 10 9 12 J 1 26-PINS SCHEMATIC, EX-SERIES DISPLAY BOARD. 8. LD 101, 102, HIGH-EFFICIENCY RED LED. 9. LD 103, 104, HIGH-EFFICIENCY YELLOW LED. 10. LD 105, HIGH-EFFICIENCY GREEN LED. 22 PC-004001-00, REV A. EX-SERIES DISPLAY BOARD SCHEMATIC DIAGRAM 1 OF 1 PAT QUILTER 6-1

41、9-90 A PROD REL PER ECO 756 1K-D R113 634 B REVISED PER ECO 1603 WR 6-19-90 SH-004001-00 1 B SH-004001-00 B FCAD: 004001SHSH4001B1.FDC 9-29-92 10uf 10uf + + 4.7uf NP 5532 1K536 A R110 R103R104 C2 C1 C107 U101 A 1 2 3 PWR GND PWR GND SPKR SIGNAL, 5V PK CLIP-LIM BUS, 0-4V RED 100 MPS2907 .0033 1N4004

42、2N 4410 14 12 9 RN102 10K-D(A) 10K-C(B) 10K-B(C) 10K-A(D) Q102 Q101 D101 R101 LD101 RN103 1K-C 1K-B 1K-A 5 6 MUTE BUS, 0-8V C103 + 470 10V C104 RED LD102 LIM-CLIP 1.5K R111 1K-B 1K-A C 109 10uF Q 104 2N 4410 4.7K THERM BUS 0-8V TO AMP +INPUT TO AMP -INPUT Vcc SENSE R SIG. GND 13 10 11 3 7 8 -15V REG

43、 +24V UNREG -24V UNREG 2 1 4 J101, 201 14-PINS +15V REG TEMP-PROT RadioFans.CN 收音机爱 好者资料库 CH 1 +IN J 31 CH 1 -IN GND CH 2 -IN CH 2 +IN J 32 GND GND CH 1 SPKR SIG GND GND -24 V +24 V -15 V REG +15 V REG GND GND CH 1 MUTE CH 2 MUTE CH 1 PWR-ON CH 2 PWR-ON CH 1 CLIP-LIM CH 2 CLIP-LIM 1. ALL RESISTORS 1

44、/4W, 5%. 2. ALL CAPACITORS 100V 3. J 32, 26-PIN CONNECTOR, TO J 1 ON FRONT DISPLAY BOARD PC-004001-00. 4. PARTS FOR CH 1 NUMBERED 301-399. 5. PARTS FOR CH 2 NUMBERED 401-499. 6. PARTS IN COMMON TO BOTH CHANNELS NUMBERED 31-49. 8. PARTS WITHIN DOTTED OUTLINE FOR USER MODIFICATION. SEE MANUAL. SCHEMAT

45、IC, EX-SERIES STANDARD INPUT BOARD. 7. BOARD SHIPPED WITH W 301-304, W 401-404 MOUNTED AS SHOWN. 470 p470 p W 303 W 304 SHIPPED XLR PIN 2 HI MOVE W 303, 304 TO ALT POSITION FOR PIN 3 HI 470 p470 pSHIPPED XLR PIN 2 HI MOVE W 303, 304 TO ALT POSITION FOR PIN 3 HI C 402C 401 W 403 W 404 SW 31 INPUTS PA

46、RALLEL MONO-BRIDGE W 401 PIN 1 V+A PIN 2 SP-A PIN 3 GND PIN 8 GND PIN 4 +1N A PIN 5 +OUT A PIN 6 -IN A PIN 7 -OUT A PIN 9 CLIP KEY PIN 10 V-A PIN 11 V- B PIN 12 CLIP B PIN 13 GND PIN 14 -0UT B PIN 15 -IN B PIN 16 +OUT B PIN 17 +IN B PIN 18 GND PIN 19 SP-B PIN 20 V+B PIN 21 SPARE PIN 22 SPARE W 301 T

47、 301 3 (4) 1 (1)4 (5) 6 (8) T 401 1 (1) 3 (4)6 (8) 4 (5) W 402 A NC R 301 C 303 C 403 R 401 NC A CH 1 THERMAL CH 2 THERMAL CH 1 AC RELAY CH 2 AC RELAY CH 2 SPKR SIG PADS FOR LEVEL 1-A OR 2-A ACCESSORY PCB W 305 W 306 W 406 W 405 A 3-POS XLR 2 3 1 A J 301 A XLR 2 3 1 A J 401 J 33 A (6, 7) A (6, 7) W

48、302 R 31 R 32 24K 220p C 31 -INPUT CH 1 +INPUT CH 1 -INPUT CH 2 +INPUT CH 2 4. NO CHANGE IN PINOUT OF J32, PINS 1-26 20.0 K CENTER STEREO NOTES, ALL REV LEVELS NOTES, REV LEVELS A-B 1. THE FIRST YEAR OF PRODUCTION EX AMPLIFIERS SHIPPED WITH PC-004002-00 REV A OR B C 302C 301 2. FOR PC-004005-00 REV

49、A, ADDED PADS 1-20 FOR LEVEL 1-A, 2-A INPUT ACCESSORY PCB 5. SW-31 WAS REVISED ON PC-004005-00 REV A, BUT WILL NOT AFFECT FUNCTION OF UPPER SLOT PCB. 3. ADDED J33, 5-PIN INPUT EXTENDER HEADER AND W305,306,405 & 406. 11 16 4 6 1 2 22 12 10 9 21 3 5 15 18 17 20 19 24 23 26 25 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS , THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS. REVISIONS ZONEREV DESCRIPTION DATE APPROVED SIZE